CN105516839A - Wireless microphone based on Bluetooth transmission technology - Google Patents
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- CN105516839A CN105516839A CN201410496410.XA CN201410496410A CN105516839A CN 105516839 A CN105516839 A CN 105516839A CN 201410496410 A CN201410496410 A CN 201410496410A CN 105516839 A CN105516839 A CN 105516839A
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Abstract
The invention discloses a wireless microphone based on Bluetooth transmission technology. The wireless microphone comprises an emitter and a receiver in wireless connection with the emitter, and the emitter and the receiver are provided with power assemblies respectively; the emitter comprises an audio input module, a first audio processing module and a first Bluetooth communication module which are electrically connected in order; and the receiver comprises a second Bluetooth communication module, a second audio processing module and an audio output module which are connected electrically in order, and the audio output module can be connected with an external output device. The wireless microphone transmits signals by adopting the Bluetooth communication protocols, and can be used by multiple people simultaneously on a large occasion, no interference is generated, and sound break does not occur during use; the operation manner is simple, the emitter can be paired with the receiver automatically, and the noise free effect can be realized needless of frequency adjustment; audio data is output stably, excellent sound quality and real sound tone can be achieved by adding the function of eliminating noise and echo to circuits; and the emitter is provided a volume adjusting key, so that the volume can be adjusted without a loudspeaker. The wireless microphone based on Bluetooth transmission technology is highly tight, flexible and deformable, and is simple in structure, comprehensive in functions, economical and practical.
Description
Technical field
The present invention relates to a kind of microphone, particularly a kind of wireless microphone, be more particularly a kind of wireless microphone based on Bluetooth transfer techniques, belong to technical field of electronic communication.
Background technology
Wireless microphone, (can be contained in pocket by some pocket transmitters, power output is about 0.01W) and a concentrated receiver composition, the pocket transmitter in every portion has a mutually different operating frequency, and concentrated receiver can receive the voice signal of the different operating frequency that the pocket transmitter in each portion sends simultaneously.It is adapted to the occasions such as stage dais.
The classification of wireless microphone, according to different definition, can divide into many different types.
rate and distinguishing
A.FM wireless microphone: be commonly called as FM and refer to the international FM broadcasting frequency range of FM88-108MHz.Early stage consumer wireless microphone utilizes FM broadcast receiver to receive, and system is simple, with low cost, but because of result of use, can not meet the requirement of professional quality, and 21 century can only become the toy of child or student.
Wireless microphone outward appearance 1
B.VHF wireless microphone: be divided into again low frequency and high band two type, the former uses the frequency range of VHF50MHz, because frequency is lower, use antenna length is oversize, the most easily be subject to again the interference of various electrical equipment clutter, therefore the product of this type, in 21 century replace by high band and disappear from the market gradually.The latter uses the frequency range of VHF200MHz, because frequency is higher, use antenna shorter, even can be designed to concealed antenna, convenient, safety is attractive in appearance again, the noise jamming of current collector greatly reduces again, circuit design is very ripe, and part is popularized cheap, so become the popular machine on current market.
C.UHF wireless microphone: frequency of utilization is the wireless microphone of 300-3000M.It is the main flow of 21 century microphone application.Because avoid the interference of the intercom of V section etc., so stability improves a lot.
distinguish
A. choosing news automatically receive wireless microphone system (Truediversityreceivingwirelesssystem): because the physical phenomenon that can produce " dead angle " (Dead-point) in electric wave carriage makes the voice output of receiver, produce intermittent or unstable shortcoming, in order to solve this defect, professional machine must adopt " choosing news automatically receive " (AutomatICswitchingdiversityreceiving) mode of double antenna and dual tuner to improve.
B. non-automatic choosing news wireless microphone system (Non-diversityreceivingwirelesssystem): because the complex circuit designs of above-mentioned type is accurate, it is more difficult to assemble, cost is higher, the type of general low price does not just adopt the design of choosing news automatically, so cannot eliminate the shortcoming that wireless microphone in use produces sound interruption yet.This machine can not meet the basic demand that professional occasion uses certainly.
mode is distinguished
A. quartz locking (QualtzLOCked) machine: produce the precise and stable fixed frequency of launching and receiving with quartz (controlled) oscillator, circuit is simple, with low cost, is the standard circuit design of current wireless microphone.Such microphone and the frequency pairing of a receiver fixed single use, and cannot change or adjust frequency of utilization.
B. PGC demodulation frequency synthesis (PLLSynthesized) machine: in use run into the interference of other signals in order to avoid wireless microphone and cannot use, or in order to use the occasion of branched microphone simultaneously, need facilitate at any time and change channel fast, so adopt the circuit design of PLL, reach the requirement of this function.
according to receiver
A. single channel machine: only the non-automatic choosing of an assembling channel is interrogated or the receiver of choosing news automatically in the cabinet of a receiver, and the former does not almost have market in Taiwan, but export markets are the most cheap because of price, are but (large look goods).The latter is simple because using, and stability of characteristics is that applicable professional occasion multichannel uses simultaneously, the best machine avoiding signal to disturb.
Multi-channel wireless microphone
B. two-way machine: in the cabinet of a receiver, the non-automatic choosing news of assembling two channels or the receiver of choosing news automatically, make full use of the space of cabinet, reduce costs.The former is exactly the type of so-called " Asia fight machine ", because simplicity of design, becomes the main machine of Taiwan volume production low price manufacturer.The latter is because mechanism and circuit complexity, and the process of internal mutual interfere and antenna mixing coupling not easily, only have the type that minority just has in the manufacturer producing professional machine.
C. multichannel machine: in the cabinet of a receiver, assembles the receiver of more than four channels, mostly adopts modularity to receive the mechanism design of module.Mainly be applicable to the use occasion of shelving formula specialty machine.
1. wireless microphone, or claim wireless microphone, be the sound appliances of transmission voice signal, by transmitter and receiver, two large divisions forms, and is commonly referred to wireless microphone system.
Transmitter is battery-powered, and sound is converted to audio electrical signal by miaow head, after the process of internal circuit, by the space of the radio wave transmission to surrounding that comprise audio-frequency information.
Receiver, generally by mains-supplied, receives by reception antenna the radio wave that transmitter sends, through the process of internal circuit, extracts audio signal, and deliver in sound reinforcement system by output signal line, complete the wireless transmission of audio signal.Usually can comprise 1 cover, 2 covers or 4 cover receiving circuits in a receiver, receive the signal of 1,2 or 4 wireless microphone respectively, be called as " one-to-one ", " one drag two " or " one drags four " type respectively.Wherein common with one drag two type.
Wireless microphone is in fact one-way fashion wireless communication system.
1.1. frequency range wireless microphone system is the equipment by radio wave transmissions voice signal, according to the height of transmitting-receiving frequency between wireless microphone and receiver, can be divided into different frequency ranges, generally the conventional several frequency range of FM, VHF, UHF.
FM frequency range refers to 88 ~ 108MHz frequency range that public FM broadcasting is used and neighbouring frequency range thereof, generally only has some easy wireless microphone products to adopt this frequency range.
VHF frequency range, according to the division of international standard, refers to 30 ~ 300MHz frequency range, and FM frequency range recited above is included in VHF frequency range in fact, just because it is close to public FM broadcasting (being called for short FM) frequency range, so be called FM frequency range.VHF frequency range wireless microphone many employing 170 ~ 260MHz frequency range, is often called again VHF high band (VHFHIGHBAND).
Uhf band, refer to 300 ~ 3000MHz frequency range, wireless microphone generally adopts 400 ~ 830MHz frequency range, more than the less employing of the frequency range of 830MHz, because 830 ~ 960MHz frequency range has GSM and CDMA mobile phone to disturb, the frequency range diffracting power of more than 960MHz is deteriorated gradually, so current most popular uhf band is in the world 800MHz frequency range (740 ~ 830MHz).
2. several vocabulary of terms will understand the performance characteristics of wireless microphone, is necessary first to understand the basic noun term of wireless microphone and the concrete meaning of main performance index.Wireless microphone, except having the audio-frequency index identical with cable microphone, also has some distinctive vocabulary of terms and performance index, below makes introductions all round.
Noise elimination: the receiver of wireless microphone is not receiving signal, or when signal is more weak, for avoiding output noise, automatically will cut off output signal, this function is called noise elimination.If without noise elimination function, or noise elimination dysfunction, then will release noise in speaker.Noise can affect acoustical quality, and destory the scene atmosphere, even damages the equipment that amplifies.
Dead point: also known as dead band.Wireless microphone is in moving process, and the signal that receiver receives can have strong and weak change because of distance, the difference of relative position or the obstruct of barrier.Some position in normal service range, excessively weak signal can make the squelch circuit action in receiver, cuts off output signal; And after leaving this position, then can normally receive and export again.This position is just called dead point or dead band.
Diversity reception: refer to the signal that can receive same wireless microphone in wireless microphone receiver from 2 antennas respectively, by internal circuit choice for use comparatively Qiang mono-road signal.This mode significantly can be eliminated and receive dead band, avoids dumb sound or produces dead point noise.Diversity reception has again two kinds of modes: antenna diversity and in put diversity.
In antenna diversity mode, have two reception antennas, a set of control circuit and a set of receiving circuit, when in working, Received signal strength is more weak, control circuit can automatically switch and use an other strip antenna.
In put in diversity mode, then except having two antennas and a set of control circuit, also have the complete receiving circuit of two covers, work simultaneously, followed the tracks of by control circuit and switch, export a good road audio signal.This mode is owing to being follow the tracks of stronger signal at any time, and thus effect is better than front a kind of mode, but circuit is complicated, and cost is high.This diversity mode is often called as again double tunning, true diversity etc.
Multichannel: general wireless microphone, its carrier frequency is fixing, and user is in use immutable.Because wireless microphone transmits voice signal by radio wave, so when existing with the outer signals that its carrier frequency is identical or close in operational environment, will disturb, make that the receiving range of receiver reduces, output noise, even not receive the signal of microphone.
For this situation, manufacturer develops again multi channel wireless microphone system.The operating frequency of its transmitter (wireless microphone) and receiver is adjustable, and such user just when running into alien frequencies interference, can change the carrier frequency of system, to avoid interference signal and normally working; In addition, if when Same Site uses multiple stage wireless microphone, can also regulate often propping up microphone in different operating frequencies easily, making it not interfere with each other, co-ordination.The wireless microphone majority that Large-scale professional stage performance uses is multichannel system, has 8 channels, 16 channels, and even more channel, wherein modal is 16 channels.Multichannel system generally will adopt phase-locked loop (PLL) frequency synthesis technique, microcomputerized control technology and some other correlation technique.Its manufacturing requirements, equipment requirement, production cost and properties of product etc., all far above other common type.
Some product on market, it is fixed frequency, but a collection of product of same model, the product of different frequency can be produced into, user can select when buying, but can not regulate its operating frequency, and some producer is also designated as " multichannel ", " 32 channels can be selected arbitrarily ", this is inaccurate, or have a mind to misguide the consumer.This situation needs to give special heed to, and has several method to distinguish: one is observe the switch or button that whether receiver panel there are adjustment channel; Two is see whether its propaganda materials or specification indicate the printed words such as " adjustable frequency ", " user is adjustable channel "; Whether three is practical operations, look at adjustable.
Signal to noise ratio: when referring to that receiver receives signal (being generally 60dB μ V) of a certain specified intensity, in its output signal, the ratio of original audio signal and noise signal, represents with decibel (dB).This value is larger, and represent that signal is purer, machine performance is better.
Receiving sensitivity: in broadcast receiver or intercom, receiving sensitivity refers to when receiver exports the signal of regulation signal to noise ratio, the size of the minimum radiofrequency signal of required input.Its value is less, illustrates that the receiving sensitivity of receiver is higher.And in wireless microphone, the value of input radio frequency signal when should be noise elimination critical with receiver represents, because when input signal is lower than noise elimination point, when receiver is in noise-limited condition, do not output signal.
Such as, certain product receiving sensitivity is labeled as "-90dBm ", and represent when antenna input signal is lower than-90dBm (i.e. 7 μ V), receiver will enter noise-limited condition, and such mark can react the receiving ability of receiver exactly.
Some product, its sensitivity index adopts the marker method of similar broadcast receiver, intercom, such as be denoted as " 2 μ V/12dB ", its implication is for when antenna input signal is 2 μ V (-101dBm), and receiver output signal can reach the signal to noise ratio of 12dB.And the signal to noise ratio index request of wireless microphone is far away higher than 12dB, so this marker method correctly can not express the receiving ability of receiver.
Radio frequency power output: refer to the size of wireless microphone transmitter to spatial emission signal energy, represents, generally between 5 ~ 50mW by milliwatt (mW) usually.
Effective working distance: the ultimate range referring to wireless microphone energy normal transmission signal.This parameter that common product indicates, it is under open ground or ideal conditions that majority indicates.Because the actual transmissions distance of wireless microphone, be subject to the impact of actual environment, cannot indicate definitely.Index only under open ground or ideal conditions, can provide reference, and can compare mutually.
In fact, weigh the transmittability of wireless microphone, see receiving sensitivity when transmitting power and critical noise elimination, these 2 index conversions are for after same unit, and its difference is larger, then the effective working distance under equal ambient is far away.Whether be diversity type in conjunction with receiver again, and be which kind of diversity mode, just can estimate and compare the effective propagation path of different product clearly.In general, the coverage of diversity receiver is greater than the receiver of overstepping one's bounds diversity, in put diversity receiver be greater than again the receiver of antenna diversity.
Wireless microphone common at present, great majority are FM (frequency modulation) wireless microphones adopting 200-700 million frequency range, there is following shortcoming in this FM wireless microphone: the frequency range that (1) uses is unstable, when a few individual uses time, easily there is serious interfering with each other in same occasion simultaneously, normal use cannot be ensured; (2) size is large, must be equipped with large receiver and reflector, carry with inconvenience.And, when reflector hangs on one's waist use, as fallen down because of carelessness, waist often can be caused to hinder; (3) be not almost with volume adjusting to be good for, needing when regulating volume is all realized by loudspeaker; (4) install and use before reflector must be regulated to follow the frequency of receiver, if regulate will definitely not produce noise; But this frequency is difficult to harmonize, and therefore unavoidably has certain noise; (5) manufacturing cost is higher; 6) function singleness.
Along with the development of Radio Transmission Technology, wireless blue tooth transmission technology also slowly replaces traditional Radio Transmission Technology, and be gradually widely used on various occasion and equipment, wireless blue tooth transmission technology has the characteristic that can transmit voice, data and signal simultaneously and not easily be disturbed, when also becoming modern user's transferring voice or data, considerable transmission equipment.Occurred a lot of bluetooth earphone on the market, but Bluetooth microphone not yet occurs at present.
Bluetooth is the radiotechnics of a kind of support equipment short haul connection (in general 10m).Wireless messages exchange can be carried out comprising between mobile phone, PDA, wireless headset, notebook computer, related peripherals etc." bluetooth " technology of utilization, can simplify the communication between mobile communication terminal device effectively, also can communication between simplified apparatus and internet Internet, thus transfer of data becomes efficient more rapidly.Bluetooth adopts distributed network structure and fast frequency hopping and short packet technology, supports point-to-point and point-to-multipoint delivery, is operated in the i.e. industry of 2.4GHzISM(of global general-use, science, medical science) frequency range.Its data rate is 1Mbps.Time division duplex transmission scheme is adopted to realize full duplex transmission.
The operation principle of bluetooth
The master slave relation of Bluetooth communication
Between every a pair equipment of Bluetooth technology regulation when carrying out bluetooth communication, must one be leading role's look, another be from role, just can communicate, and during communication, must be searched by main side, and initiation is matched, link setup successfully after, both sides get final product transceiving data.In theory, a bluetooth main side equipment, can carry out communication with 7 bluetooths from end equipment simultaneously.The equipment possessing blue tooth communication function, can switch, be operated in from pattern at ordinary times, wait for other main equipment to connect, when needing, be converted to holotype, make a call to miscellaneous equipment between two roles.When a bluetooth equipment makes a call with holotype, need the Bluetooth address knowing the other side, the information such as pairing password, after having matched, can directly make a call.[
The calling procedure of bluetooth
Bluetooth main side equipment makes a call, and first searches, and being in around finding out can by the bluetooth equipment searched.Main side equipment finds after end bluetooth equipment, and from hold bluetooth equipment to match, now needs to input the PIN code from end equipment, also has equipment not need input PIN code.After having matched, can record the trust information of main side equipment from end bluetooth equipment, now main side can make a call to from end equipment, and the equipment matched, when calling out next time, no longer needs again to match.The equipment matched, also can initiate link setup request, but the bluetooth module doing data communication does not generally make a call as the bluetooth earphone from end.After link establishment success, between principal and subordinate two ends, two-way data or speech communication can be carried out.In a communication state, main and slave terminal equipment can initiate chain rupture, disconnects Bluetooth link.
Bluetooth man-to-man serial data transmission application
In Bluetooth data transfer application, serial data communication is one of modal application one to one, namely bluetooth equipment has established the unpaired message between two bluetooth equipments in advance before dispatching from the factory, main side prestores PIN code, address etc. from end equipment, terminal device powers up i.e. automatic link establishment, transparent Serial Port Transmission, without the need to peripheral circuit intervention.Can be set to two types from end equipment in application one to one, one is silent status, namely can only communicate with the main side of specifying, is not searched by other bluetooth equipment; Two is development status, both can be designated main side and search, and also can be searched link setup by other bluetooth equipment.
Summary of the invention
The object of the invention is to the deficiency overcoming conventional wireless microphone, provide one by bluetooth. the wireless microphone that mode is transmitted.
For achieving the above object, present invention employs following technical scheme:
Design a kind of wireless microphone based on Bluetooth transfer techniques, comprise the reflector and receiver that wirelessly connect; Power supply module is respectively equipped with in described reflector and receiver;
Wherein, described reflector comprises the Audio Input Modules, the first audio processing modules and the first bluetooth communication module that are electrically connected successively; Described receiver comprises the second bluetooth communication module, the second audio processing modules and the dio Output Modules that can be connected output peripheral equipment that are electrically connected successively.
Further, described first bluetooth communication module comprises baseband processing unit and RF processing unit, and the digital audio and video signals that the first audio processing modules transmits is changed into Bluetooth signal by it, then by the first embedded with bluetooth antenna, Bluetooth signal is sent to receiver;
Described second bluetooth communication module comprises baseband processing unit and RF processing unit, and it receives the Bluetooth signal coming from reflector by the second embedded with bluetooth antenna, then Bluetooth signal is changed into digital audio and video signals, and send the second audio processing modules to.
Preferably, described reflector is also provided with sound volume control device.
Described reflector is provided with the first pairing and is good for, and receiver is provided with the second pairing and is good for.
Described power supply module comprises charging circuit, electric power management circuit and rechargeable battery; Described rechargeable battery preferably files battery.
Described reflector is provided with geometrical clamp.
One end of described reflector is provided with audio input port, and the other end is provided with switching device and charge port; One end of receiver is provided with audio interface plug, and the other end is provided with switching device and charge port.
Described reflector and receiver are respectively equipped with LED light.
Audio amplifier circuit can also be connected with between described second audio processing modules and dio Output Modules.
Compared with prior art, the present invention has following advantage and beneficial effect:
1. adopt bluetooth communication agreement to carry out Signal transmissions, because bluetooth adopts unique 2.4G frequency range, therefore many people can use in same large occasion simultaneously, any interference can not be produced, also can not produce the phenomenon of staccato in the middle of using;
2. after the present invention opens switching device, waiting after 3 seconds (pairing) can plug and play, and mode of operation is simple, can automatic matching between reflector and receiver, need not debug frequency and also can realize noise-free effect;
3. voice data stable output, circuit adds and eliminates noise and echo function, can realize graceful tonequality and real tone color;
4. the reflector in the middle of the present invention and the length of receiver only have about 57mm, and its volume is little, and function is complete, is convenient for carrying, as long as in any environment the audio interface that receiver is inserted on micropkonic audio interface or other external equipments just can be used at once.Due to easy to use and carry, its scope of application is very wide, such as, class hour is said by school and college, cram school teacher, when school and various group's outdoor activities, when travel agency guide is with, during various advertising campaign, during various religion rally, and when large hospital, parking lot, factory etc.;
5. reflector of the present invention is provided with volume adjusting to be good for, regulates during volume and need not be realized by loudspeaker;
6. the present invention can carry out compatibility with the equipment of all employing Bluetooth protocols, such as notebook computer, video camera, PDA, MP3/MP4, karaoke system, satellite navigator and loudspeaker etc.;
7. manufacturing cost is lower;
8. power consumption is little.
Accompanying drawing explanation
Fig. 1 is the perspective view of the reflector of the wireless microphone that the present invention is based on Bluetooth transfer techniques;
Fig. 2 is the perspective view of the receiver of the wireless microphone that the present invention is based on Bluetooth transfer techniques;
Fig. 3 is the functional-block diagram of the reflector of the wireless microphone that the present invention is based on Bluetooth transfer techniques;
Fig. 4 is the functional-block diagram of the receiver of the wireless microphone that the present invention is based on Bluetooth transfer techniques.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated.
As shown in Figure 1, Fig. 1 is the perspective view of the reflector of the wireless microphone that the present invention is based on Bluetooth transfer techniques.This reflector 1 is provided with geometrical clamp 2, can just be fixedly clamped in the position, front of user by reflector 1.One end of reflector is provided with audio input port 3 that can be relative with sound source, and the other end is provided with switching device and charge port.
In addition, reflector 1 is also provided with volume and controls by strong 4, and this volume controls simultaneously by strong 4 also first to match as what match with receiver and be good for.Understand the current operating state of reflector for the ease of user, reflector 1 is also provided with LED light So
Fig. 2 is the perspective view of the receiver of the wireless microphone that the present invention is based on Bluetooth transfer techniques.This receiver 6 one end is provided with the universal audio plug 7 of 2.5mm/3.5mm, for connecting the output peripheral equipments 10 such as such as loudspeaker,
The other end of receiver 6 is provided with switching device and charge port.This receiver 6 be provided with match with reflector 1 second match strong 8.Understand the current operating state of receiver 6 for the ease of user, receiver 6 is also provided with LED light 9.
Fig. 3 is the functional-block diagram of the reflector 1 of the wireless microphone that the present invention is based on Bluetooth transfer techniques.Wherein, reflector 1 inside comprises Audio Input Modules 11, first audio processing modules 12 and the first bluetooth communication module 13 that are electrically connected successively; In addition, also be provided with power supply module 14 in this reflector, comprise charging circuit 141, electric power management circuit 142 and chargeable hairpin battery 143 etc., to provide the electric energy needed for work to each module, and charge port can be utilized to be connected with charger, to charge to elder sister's battery 143.Wherein, Audio Input Modules n utilizes pick-up head 1n to receive external voice signal, and exports simulated audio signal to the first audio processing modules 12; First audio processing modules 12 comprises audio coding/decoding circuit, and the simulated audio signal for being inputted by Audio Input Modules 11 converts corresponding digital audio and video signals to; First bluetooth communication module 13 comprises baseband processing unit 131 and RF processing unit 132, for digital audio and video signals is changed into Bluetooth signal, then by the first embedded with bluetooth antenna 133, Bluetooth signal is sent to receiver 6.
Fig. 4 is the functional-block diagram of the receiver 6 of the wireless microphone that the present invention is based on Bluetooth transfer techniques.This receiver 6 comprises the second bluetooth communication module 61, second audio processing modules 62 and the dio Output Modules 63 be electrically connected successively; In addition, also be provided with power supply module 64 in this receiver 6, comprise charging circuit 641, electric power management circuit 642 and chargeable file battery 643 etc., to provide the electric energy needed for work to each module, and charge port can be utilized to be connected with charger, to charge to hairpin battery 643.Described second bluetooth communication module 61 comprises RF processing unit 611 and baseband processing unit 612, it receives the Bluetooth signal coming from reflector 1 by the second embedded with bluetooth antenna 613, then Bluetooth signal is changed into digital audio and video signals, and send the second audio processing modules 62 to; Digital audio and video signals is changed into simulated audio signal by the second audio processing modules 62, then sends dio Output Modules 63 to.Dio Output Modules 63 is connected, by audio signal amplification output by external equipments such as universal audio plug 7 and such as loudspeakers.When being connected with the external equipment without signal amplifying function, an audio amplifier circuit can be connected at the second audio processing modules 62 with between dio Output Modules 63, to export again after amplifying audio signal.
The present invention adopts bluetooth communication agreement to carry out Signal transmissions, and same large occasion can many people use simultaneously, can not produce any thousand and disturb, and also can not produce the phenomenon of staccato in the middle of using; Mode of operation is simple, can automatic matching between reflector and receiver, need not debug frequency and also can realize noise-free effect; Voice data stable output, circuit adds and eliminates noise and echo function, can realize graceful tonequality and real tone color; Reflector is provided with volume adjusting to be good for, regulates during volume and can need not be realized by loudspeaker.
Compared with prior art, the present invention has following advantage and beneficial effect:
1. adopt bluetooth communication agreement to carry out Signal transmissions, because bluetooth adopts unique 2.4G frequency range, therefore many people can use in same large occasion simultaneously, any interference can not be produced, also can not produce the phenomenon of staccato in the middle of using;
2. after the present invention opens switching device, waiting after 3 seconds (pairing) can plug and play, and mode of operation is simple, can automatic matching between reflector and receiver, need not debug frequency and also can realize noise-free effect;
3. voice data stable output, circuit adds and eliminates noise and echo function, can realize graceful tonequality and real tone color;
4. the reflector in the middle of the present invention and the length of receiver only have about 57mm, and its volume is little, and function is complete, is convenient for carrying, as long as in any environment the audio interface that receiver is inserted on micropkonic audio interface or other external equipments just can be used at once.Due to easy to use and carry, its scope of application is very wide, such as, class hour is said by school and college, cram school teacher, when school and various group's outdoor activities, when travel agency guide is with, during various advertising campaign, during various religion rally, and when large hospital, parking lot, factory etc.;
5. reflector of the present invention is provided with volume adjusting to be good for, regulates during volume and need not be realized by loudspeaker;
6. the present invention can carry out compatibility with the equipment of all employing Bluetooth protocols, such as notebook computer, video camera, PDA, MP3/MP4, karaoke system, satellite navigator and loudspeaker etc.;
7. manufacturing cost is lower;
8. power consumption is little.
The above, for the person of ordinary skill of the art, can make other various corresponding change and distortion according to technical scheme of the present invention and technical conceive, and all these change and be out of shape the protection range that all should belong to the claims in the present invention.
Claims (10)
1., based on a wireless microphone for Bluetooth transfer techniques, comprising:
One reflector wirelessly connected and receiver,
Power supply module is respectively equipped with in described reflector and receiver;
It is characterized in that:
Described reflector comprises the Audio Input Modules, the first audio processing modules and the first bluetooth communication module that are electrically connected successively;
Described receiver comprises the second bluetooth communication module, the second audio processing modules and the dio Output Modules that can be connected output peripheral equipment that are electrically connected successively.
2. the wireless microphone based on Bluetooth transfer techniques according to claim 1, is characterized in that:
Described first bluetooth communication module comprises baseband processing unit and RF processing unit, and the digital audio and video signals that the first audio processing modules transmits is changed into Bluetooth signal by it, then by the first embedded with bluetooth antenna, Bluetooth signal is sent to receiver;
Described second bluetooth communication module comprises baseband processing unit and RF processing unit, and it receives the Bluetooth signal coming from reflector by the second embedded with bluetooth antenna, then Bluetooth signal is changed into digital audio and video signals, and send the second audio processing modules to.
3. the wireless microphone based on Bluetooth transfer techniques according to claim 1, is characterized in that described reflector is also provided with sound volume control device.
4. the wireless microphone based on Bluetooth transfer techniques according to claim 1, is characterized in that: described reflector is provided with the first pairing key; Described receiver is provided with the second pairing and is good for.
5. the wireless microphone based on Bluetooth transfer techniques according to claim 1, is characterized in that: described power supply module comprises charging circuit, electric power management circuit and rechargeable battery.
6. the wireless microphone based on Bluetooth transfer techniques according to claim 5, is characterized in that: described rechargeable battery is clang battery.
7. the wireless microphone based on Bluetooth transfer techniques according to claim 1, is characterized in that: described reflector is provided with geometrical clamp.
8. the wireless microphone based on Bluetooth transfer techniques according to claim 1, is characterized in that:
One end of described reflector is provided with audio input port, and one end that the other end is provided with switching device and the described receiver of charging is provided with audio interface plug, and the other end is provided with switching device and charging.
9. the wireless microphone based on Bluetooth transfer techniques according to claim 1, is characterized in that: described reflector and receiver are respectively equipped with LED light.
10. the wireless microphone based on Bluetooth transfer techniques according to claim 1, is characterized in that: be also connected with audio amplifier circuit between described second audio processing modules and dio Output Modules.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634529A (en) * | 2016-02-01 | 2016-06-01 | 李兰 | Intelligent interphone with Bluetooth automatic adaption frequency |
| CN105916069A (en) * | 2016-04-19 | 2016-08-31 | 安徽理工大学 | Intelligent microphone capable of converting voice into text in real time |
| CN106911339A (en) * | 2017-04-14 | 2017-06-30 | 江门市魔音高科科技有限公司 | A kind of cell-phone camera audio sync adds live public address system |
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| CN109151408A (en) * | 2018-09-25 | 2019-01-04 | 长沙世邦通信技术有限公司 | A kind of full duplex window talkback device, system and its intercommunication method |
| CN109167982A (en) * | 2018-09-25 | 2019-01-08 | 长沙世邦通信技术有限公司 | A kind of full duplex window talkback device, system and its intercommunication method |
| CN109510635A (en) * | 2017-09-15 | 2019-03-22 | 深圳科润视讯技术有限公司 | A kind of wireless receiver |
| CN109787661A (en) * | 2019-03-21 | 2019-05-21 | 达铭实业（宿州）股份有限公司 | A kind of Bluetooth signal high-speed transfer device |
| CN112995819A (en) * | 2021-02-03 | 2021-06-18 | 深圳市志泽科技有限公司 | Wireless two-way communication system |
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2014
- 2014-09-25 CN CN201410496410.XA patent/CN105516839A/en active Pending
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| CN105634529B (en) * | 2016-02-01 | 2018-09-21 | 李兰 | Intelligent intercom with bluetooth automatic adaptation frequency |
| CN105634529A (en) * | 2016-02-01 | 2016-06-01 | 李兰 | Intelligent interphone with Bluetooth automatic adaption frequency |
| CN105916069A (en) * | 2016-04-19 | 2016-08-31 | 安徽理工大学 | Intelligent microphone capable of converting voice into text in real time |
| CN106911339A (en) * | 2017-04-14 | 2017-06-30 | 江门市魔音高科科技有限公司 | A kind of cell-phone camera audio sync adds live public address system |
| CN107154184A (en) * | 2017-06-28 | 2017-09-12 | 杭州种花家科技有限公司 | A kind of virtual reality device system and method for language learning |
| CN107154184B (en) * | 2017-06-28 | 2020-09-22 | 杭州种花家科技有限公司 | Virtual reality equipment system and method for language learning |
| CN109510635A (en) * | 2017-09-15 | 2019-03-22 | 深圳科润视讯技术有限公司 | A kind of wireless receiver |
| CN109167982A (en) * | 2018-09-25 | 2019-01-08 | 长沙世邦通信技术有限公司 | A kind of full duplex window talkback device, system and its intercommunication method |
| CN109167982B (en) * | 2018-09-25 | 2020-09-15 | 长沙世邦通信技术有限公司 | Full-duplex window intercom device, system and intercom method thereof |
| CN109151408B (en) * | 2018-09-25 | 2020-09-15 | 长沙世邦通信技术有限公司 | Full-duplex window intercom device, system and intercom method thereof |
| CN109151408A (en) * | 2018-09-25 | 2019-01-04 | 长沙世邦通信技术有限公司 | A kind of full duplex window talkback device, system and its intercommunication method |
| CN109787661A (en) * | 2019-03-21 | 2019-05-21 | 达铭实业（宿州）股份有限公司 | A kind of Bluetooth signal high-speed transfer device |
| CN112995819A (en) * | 2021-02-03 | 2021-06-18 | 深圳市志泽科技有限公司 | Wireless two-way communication system |
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Application publication date: 20160420 |